RS-485 查看數據表（PDF） - Exar Corporation
零件编号
产品描述 (功能)
生产厂家
RS-485 Datasheet PDF : 23 Pages
| |||
SP339E
REV. 1.0.4
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
BLOCK DIAGRAM BY MODE (MODE1, MODE0)
FIGURE 1. MODE 00 - LOOPBACK
C2
C3
0.1µF
0.1µF
C1
0.1µF
C4
0.1µF
Cc
1.0µF
40
39
38
37
36
35
34
33
32
31
L1
1
R1
30
L2
2
R2
29
L3
3
T1
28
L4
4
L6
5
L7
6
L8
7
L9
8
27
T2
26
R3
25
T3
24
R4
23
R5
Vcc
9
22
All pull-downs 330k̢
10
21
11
12
13
14
15
16
17
18
19
20
11
Share Link: 